This kind of magnesium oxide used for bromination butyl rubber stopper and halogenatebutyl rubber stopper mainly. The main functions are vulkacit and to absorb acid.
The requirements for magnesium oxide: in general, the light magnesium oxide and active magnesium oxide are used for it.
The requirements for light magnesium oxide: MgO is equal or greater than 93-95%, CaO is less than or equal to 1.5%, apparent specific volume is equal or greater than 5ml/g. The fineness is 325 mesh, residue on sieve is less than or equal to 0.01, and the insoluble matter in hydrochloric acid can achieve national standard premium grade.
The requirements for active magnesium oxide: the iodine absorption value is over 120. The other indexes is the same with above.
When the clarity and whiteness are very general, the domestic magnesium oxide has a higher purity with a better whiteness. Relatively speaking, the impurity is less.
In the aspect of indexes, Hebei Meishen Technology Co., Ltd is the drafter and reviser of national magnesium oxide industry standard, and a professional magnesium oxide supplier and manufacturer. It is worth to be trusted and can meet various of requirements from users.
Matters need attention: it is very strict to the fineness, mechanical impurities and black-and-white point. In general, each 10 grams should not over 5 black-and-white points.